In terms of section 30(4) of the OHSA, when the inspector issue the employer with the contravention notice, the employer is directed to comply with the requirements of the notice within 60 days, how is the 60 days calculated

Here's how the 60 days are calculated:

1. Exclude the first day: The day the notice was issued to the employer is not counted.
2. Include the last day: The 60th day is included in the calculation.
3. Weekend/Public Holiday Rule: If the 60th day falls on a Sunday or a public holiday, the deadline is extended to the next succeeding day that is not a Sunday or a public holiday.

So, you start counting from the day after the notice was issued, and the deadline is the 60th day thereafter, adjusting for weekends and public holidays.